Parker 590+ DRV - Page 218

7-24 Trips and Fault Finding
DC590+ DRV Series DC Digital Drive
MMI display and
status LEDs OFF
Is 120V present at drive
terminals D1 & D2?
No
Yes
Check fuse FS1 on
the power board.
Is it good?
Yes
Is the transformer
tap in place?
Yes
Replace control door.
Does the drive work?
No
Are all the wires and
terminals connected
and tight?
Yes
Replace stack
Is supply voltage
present at primary
of fuses F4 and F5?
Yes
No
Wiring from fuses F1 &
F2 to F4 & F5 bad
Is supply voltage
present at secondary
of fuses F4 and F5?
Yes
No
Check fuses F4 and F5
Is 120V present at
transformer terminals
X1 and X2?
Yes
No
Check fuse F6
Is it good?
Yes
590+ DRV chassis bad Transformer bad
Figure 7-2 Control Power Troubleshooting Flowchart (Frames 3, 4, 5 & 7)